21835032 has 64 divisors (see below), whose sum is σ = 57054720. Its totient is φ = 6956928.

The previous prime is 21835019. The next prime is 21835039. The reversal of 21835032 is 23053812.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21834993 and 21835011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21835039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59313 + ... + 59679.

It is an arithmetic number, because the mean of its divisors is an integer number (891480).

Almost surely, 2^21835032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21835032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28527360).

21835032 is an abundant number, since it is smaller than the sum of its proper divisors (35219688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21835032 is a wasteful number, since it uses less digits than its factorization.

21835032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 21835032 is about 4672.7970210571. The cubic root of 21835032 is about 279.5018011646.

Adding to 21835032 its reverse (23053812), we get a palindrome (44888844).

The spelling of 21835032 in words is "twenty-one million, eight hundred thirty-five thousand, thirty-two".